# include <iostream>
#include <vector>
using namespace std;
void test01(){
    vector<vector<int>>v;
    vector<int>v1;
    vector<int>v2;
    vector<int>v3;
    vector<int>v4;
    vector<int>v5;
    for (int i = 0; i <4 ; ++i) {
        v1.push_back(i+1);
        v2.push_back(i+2);
        v3.push_back(i+3);
        v4.push_back(i+4);
        v5.push_back(i+5);
    }
    v.push_back(v1);
    v.push_back(v2);
    v.push_back(v3);
    v.push_back(v4);
    v.push_back(v5);
    for(vector<vector<int>>::iterator it=v.begin();it!=v.end();it++){
        for(vector<int>::iterator vit=(*it).begin(); vit!=(*it).end();vit++){
            cout<<*vit<<"  ";
        }
        cout<<endl;
    }
}
int main() {
test01();
    return 0;
}
